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Fuel injectors pulsating too fast - Flooding Engine

Old 07-12-2012, 06:25 PM
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Fuel injectors pulsating too fast - Flooding Engine

75 280z manual

Fuel Injectors Pulsating Too Fast and Flooding Engine

Fuel pressure is 30-35 (appropriate)

When fuel line is clamped off, engine will run til existing gas is depleted. However, when fuel is allowed to be injected at the rate the injectors are pulsating, it floods the engine.

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Old 07-12-2012, 06:29 PM
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Have you checked the coolant temp sensor (two prong) on the thermostat housing? That and the AFM are the two sensors that tell the ecu / injectors to spray.
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Old 09-09-2012, 05:23 PM
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Pulsating too fast... Thats a new one. Just decrease the duration in relation to the extra speed and everything will even out.
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Old 09-17-2012, 06:12 AM
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Long Story Short.... looks like the Temp Sensor (not "Switch", which btw only pertains to automatics which have dual pickup distributors and rely on the temp "Switch" to control the retarding and advancing of the distributor... My Z is a Manual, hence, the temp switch had nothing to do with my problem)...as I was saying, looks like I bumped the Temp Senor lead while changing my distributor wires. Apparently, the senor "tested ok" but after fixing the lead the sensor then needed to be replaced.

Car is running well but still working kinks out...such as I'm noticing that if the engine is hot after shuting it down for a few minutes, the engine is difficult to start...acts as if it is either flooded or can't get enough fuel initially and slowly ramps up to normal operation.... Ideas??? And Don't Say "It's the Temp Sensor"!?! LOL
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